No it is not possible to connect SAP to Non-SAP systems to retrieve data using RFC alone. RFC can acces the SAP from outside only through BAPI and same is for vice versa access.
- Is there a way to populate the Time Clocking data for employee using the BAPI/RFC.
- Retrieve Data from SAP Using Excel Power Query
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- How to establish RFC connections to SAPNet R/3 Frontend if there is no connection or if the system performance is poor.